Abstract: A detecting circuit measures at least one response characteristic of an output channel in an electro-acoustic transducer system. A memory stores a plurality of equalizations, each equalization corresponding to a known electro-acoustic transducer system associated with at least one response characteristic stored in the memory. A processor in communication with the detecting circuit and the memory selects one of the stored response characteristics matching the response characteristic measured by the detecting circuit. In some cases, an appropriate equalization is loaded based on the selected response characteristic.

Abstract: A vehicle engine harmonic enhancement system. A method for operating the system includes providing a first engine harmonic enhancement audio signal and equalizing the first engine harmonic enhancement audio signal separately for each of the plurality of loudspeakers to provide individually equalized loudspeaker engine harmonic enhancement audio signals. A vehicle audio system includes a plurality of loudspeakers, an entertainment audio system, and an engine harmonic enhancement system. A method includes equalizing an entertainment audio signal to provide an equalized entertainment audio signal; providing an engine harmonic enhancement audio signal; equalizing the engine harmonic enhancement audio signal separately from the entertainment audio signal to provide an equalized engine harmonic enhancement audio signal; and combining the equalized entertainment audio signal with the equalized engine harmonic enhancement audio signal.

Abstract: Apparatus and method of an ANR circuit providing both feedforward-based and feedback-based ANR, possibly of a personal ANR device, compressing both feedforward and feedback reference sounds detected by feedforward and feedback microphones, respectively, in response to the acoustic energy of the feedforward reference noise sound reaching a predetermined level.

Abstract: An earpiece. The earpiece includes an electronics module for wirelessly receiving incoming audio signals from an external source. The earpiece further includes a positioning and retaining structure comprising at least an outer leg and an inner leg, each of the outer leg and inner leg being attached at an attachment end to the body and attached at a joined end to each other. The outer leg lies in a plane. The positioning and retaining structure is substantially stiffer in one direction than in another. In its intended position, one of the two legs contacts the anti-helix at the rear of the concha, the joined end is under the anti-helix; a planar portion of the body contacts the concha; and a portion of the body is under the anti-tragus.

Abstract: A loudspeaker including a moving magnet motor. The moving magnet motor includes an armature comprising a magnet carrier, and a lever arm, coupling the armature and a pivot. The lever arm further couples the armature and an acoustic diaphragm to transmit motion of the armature to the acoustic diaphragm to cause the acoustic diaphragm to move. The loudspeaker described may be torque balance and moment balanced.

Abstract: A loudspeaker including a moving magnet motor. The moving magnet motor includes an armature comprising a magnet carrier, and a lever arm, coupling the armature and a pivot. The lever arm further couples the armature and an acoustic diaphragm to transmit motion of the armature to the acoustic diaphragm to cause the acoustic diaphragm to move. The loudspeaker described may be torque balance and moment balanced.

Abstract: An active suspension seat is mounted to a floor of a vehicle with a floor plate having a lower portion through which is formed a first plurality of apertures positioned about the lower portion to correspond to the manner in which mounting features are positioned about the floor of the vehicle, and having an upper portion through which is formed a second plurality of apertures positioned about the upper portion to correspond to the manner in which apertures are positioned about a lower frame of the active suspension seat, and to enable the active suspension seat to be coupled to the floor plate by inserting fasteners through the second plurality of apertures from locations external to the lower frame.

Abstract: In a personal ANR device having a pair of earpieces, each having a feedforward microphone and an ANR circuit associated therewith, each ANR circuit provides digital data representing environmental noise sounds detected by each ANR circuit's associated feedforward microphone. Such digital data may represent the environmental noise sounds as detected with little or not modification, or such digital data may be modified to some degree within each ANR circuit, perhaps to limit the range of frequencies that such digital data represents, before being provided to the other ANR circuit.

Abstract: User occupancy is monitored within a space in which a video display of a content rendering system is viewable. The user occupancy can be monitored based on physical user attributes. At least one of audio rendering and video rendering by the content rendering system is adjusted based on the monitored user occupancy.

Abstract: An audio amplifier, that includes a planar inductor structure that includes a first plurality of windings, formed on layers of a first circuit board and a second plurality of windings, formed on layers of a second circuit board. The planar inductor structure may further include a sense winding.

Abstract: The impedance of ionic solutions may be determined using a bridge circuit where the ionic solution forms one leg of the bridge circuit and a reference impedance characterized by a reference time constant forms a second leg of the bridge circuit. The bridge is driven by a switched DC voltage waveform. Measurement of the ionic solution is delayed after switching to allow the reference impedance to reach its asymptotic value. The reference impedance may be varied to reduce the reference time constant.

Abstract: A three dimensional acoustic passive radiator diaphragm. A diaphragm a three dimensional volume. An acoustic driver radiates pressure waves into the three dimensional volume to cause the diaphragm to expand and contract. The three dimensional passive radiator may include a core of a porous, compressible material.

Abstract: An apparatus and method for automatically remotely controlling an audio source providing the apparatus with audio for being audibly output to a user of the apparatus entails monitoring various sensors to determine whether or not one or more ear couplings of the apparatus are positioned in close proximity to one or both of the user's ears to determine whether the user is listening to the audibly output audio with either one or both ears, or is not listening at all. In response to changes in whether the user is listening with either one or both ears, or whether the user is listening at all, the audio source is automatically signaled with one or more commands to cease or resume providing the audio to the apparatus, perform or cease performing various alterations on the audio before providing it to the apparatus, etc.

Abstract: A method for clipping and post-clipping processing an audio signal, includes clipping an audio signal to provide a clipped audio signal; filtering, by a first filter, the audio signal to provide a filtered unclipped audio signal; and filtering, by a second filter, the clipped audio signal to provide a filtered clipped audio signal. The method further includes differentially combining the filtered clipped audio signal and the clipped audio signal to provide a differentially combined audio signal; and combining the filtered unclipped audio signal and the differentially combined audio signal to provide an output signal.

Abstract: A headset is able to be coupled via a cable to an intercom system, is able to be wirelessly coupled to a wireless device via a wireless transceiver of the headset, and is able to be connected to a wired device via another cable. A controller of the headset separately monitors the microphone conductors and audio conductors by which the headset may be coupled to the intercom system to detect whether or not one or both of a communications microphone and an acoustic driver of the headset are coupled to the intercom system, and monitors the operating state of the wireless transceiver to detect whether or not the wireless transceiver is inactive, on standby or in use; and selectively couples a system ground conductor to one of the microphone conductors, selectively provides a local sidetone, and/or selectively provides a local microphone bias voltage in response to what is observed through such monitoring.

Abstract: An audio system including an audio power amplifier, a transducer electrically connected to the audio power amplifier, an enclosure coupled to the transducer, and a secondary resonant element coupled to the enclosure. An electrical feedback signal representative of the transducer current is negatively fed back to the audio power amplifier to synthesize a positive output impedance.

Abstract: A fuel cell including an MEA sealed by a multi-block copolymer gasket is disclosed. The self-assembling, nanophase-separated polymer exhibits higher corrosion resistance relative to typical silicone gaskets while providing a better seal of the MEA to the fuel cell housing than PTFE.